body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:20px;line-height:1.6;color:#111;background:#fff}
header,main,footer{max-width:760px;margin:0 auto;padding:24px}
header{border-bottom:2px solid #111}header a.brand{font-size:28px;font-weight:700;color:#111;text-decoration:none}
nav{margin-top:12px}nav a{display:inline-block;padding:12px 16px;margin:0 8px 8px 0;border:2px solid #111;border-radius:8px;color:#111;text-decoration:none;font-weight:600}
nav a:hover,nav a:focus{background:#111;color:#fff}h1{font-size:36px;line-height:1.2}h2{font-size:26px}a{color:#0047b3}
footer{border-top:2px solid #111;font-size:17px;color:#222}dl dt{font-weight:700;margin-top:12px}dl dd{margin:0}